CONFIG_ARM_CRYPTO is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARM_CRYPTO.
Result is shown for kernelversion 6.9.5

ARM Accelerated Cryptographic Algorithms

configname: CONFIG_ARM_CRYPTO

Linux Kernel Configuration
└─>ARM Accelerated Cryptographic Algorithms
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Say Y here to choose from a selection of cryptographic algorithms
implemented using ARM specific CPU features or instructions.

depends
CONFIG_ARM